46 CFR § 5.40 - Credential and merchant mariner credential.

---
identifier: "/us/cfr/t46/s5.40"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 5.40 - Credential and merchant mariner credential."
title_number: 46
title_name: "Shipping"
section_number: "5.40"
section_name: "Credential and merchant mariner credential."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "A"
subchapter_name: "PROCEDURES APPLICABLE TO THE PUBLIC"
part_number: "5"
part_name: "MARINE INVESTIGATION REGULATIONS—PERSONNEL ACTION"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "46 U.S.C. 2103, 7101, 7301, 7701; DHS Delegation 00170.1, Revision No. 01.2."
regulatory_source: "CGD 82-002, 50 FR 32184, Aug. 9, 1985, unless otherwise noted."
cfr_part: "5"
---


# 5.40 Credential and merchant mariner credential.

*Credential* means any or all of the following:

(1) Merchant mariner's document.

(2) Merchant mariner's license.

(3) STCW endorsement.

(4) Certificate of registry.

(5) Merchant mariner credential.

*Merchant mariner credential or MMC* means the credential issued by the Coast Guard under 46 CFR part 10. It combines the individual merchant mariner's document, license, and certificate of registry enumerated in 46 U.S.C. subtitle II part E as well as the STCW endorsement into a single credential that serves as the mariner's qualification document, certificate of identification, and certificate of service.

[USCG-2006-24371, 74 FR 11214, Mar. 16, 2009]